CVE-2024-39503

CVE-2024-39503 · netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

Cette page présente une partie des faits des sources. Consultez les avis liés pour la description complète et les versions concernées.

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type Lion Ackermann reported that there is a race condition between namespace cleanup in ipset and the garbage collection of the list:set type. The namespace cleanup can destroy the list:set type of sets while the gc of the set type is waiting to run in rcu cleanup. The latter uses data from the destroyed set which thus leads use after free. The patch contains the following parts: - When destroying all sets, first remove the garbage collectors, then wait if needed and then destroy the sets. - Fix the badly ordered "wait then remove gc" for the destroy a single set case. - Fix the missing rcu locking in the list:set type in the userspace test case. - Use proper RCU list handlings in the list:set type. The patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc).

CVSS 7.8 · Élevée · EPSS 0,2% · Correctif disponible

Publication

2024-07-12T12:20:36.299Z

Mise à jour

2026-10-15T00:44:40.530Z

Pile logicielle: system

Vérifiez votre serveur →